Learn where your lessons are

Scripts and plays need strong dialogue. Because, really, the dialogue has to sell the piece.

Fantasy and science fiction writers have to be good at world building as their worlds are unfamiliar to their readers.

Psychological thrillers better be good at interiority, or readers are really going to miss the psychological parts.

Though all parts of writing are important all the time, there are some forms of writing that really depend on one key ingredient over the other. When you realize that you need to work on one part of your writing, find the form that exercises it the most, and then immerse yourself in the writers. Worst case, you'll have read a lot of good books along the way!